ixgbe: Specify Rx hash type WRT Rx desc RSS type

RSS could be leveraged by taking account L4 src/dst ports
as ingredients, thus ingress skb Rx hash type should honor
such the real configuration.

Signed-off-by: Fan Du <fan.du@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 9aa6104..3e6a931 100644 (file)
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -1360,14 +1360,31 @@ static int __ixgbe_notify_dca(struct device *dev, void *data)
 }
 
 #endif /* CONFIG_IXGBE_DCA */
+
+#define IXGBE_RSS_L4_TYPES_MASK \
+       ((1ul << IXGBE_RXDADV_RSSTYPE_IPV4_TCP) | \
+        (1ul << IXGBE_RXDADV_RSSTYPE_IPV4_UDP) | \
+        (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_TCP) | \
+        (1ul << IXGBE_RXDADV_RSSTYPE_IPV6_UDP))
+
 static inline void ixgbe_rx_hash(struct ixgbe_ring *ring,
                                 union ixgbe_adv_rx_desc *rx_desc,
                                 struct sk_buff *skb)
 {
-       if (ring->netdev->features & NETIF_F_RXHASH)
-               skb_set_hash(skb,
-                            le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
-                            PKT_HASH_TYPE_L3);
+       u16 rss_type;
+
+       if (!(ring->netdev->features & NETIF_F_RXHASH))
+               return;
+
+       rss_type = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.pkt_info) &
+                  IXGBE_RXDADV_RSSTYPE_MASK;
+
+       if (!rss_type)
+               return;
+
+       skb_set_hash(skb, le32_to_cpu(rx_desc->wb.lower.hi_dword.rss),
+                    (IXGBE_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
+                    PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
 }
 
 #ifdef IXGBE_FCOE